I had one, worked great!
The CD-ROM and pad came with it so if you see one anywhere on its own it would essentially be useless.
Was a fantastic piece of kit in its day, buy as people have said theres zero support for it and they go for stupid money (got 125 GBP for mine) on eBay.
The CD-ROM has
to be a 2x Panasonic CDR 563B.